There had been a light tapping noise,which sounded like it could have been a worn cam follower, rocker spindle,worn valve guide or some other not too serious a problem.
As it turned out it was a lot more serious when I found what looks like corroded but not worn Big End Shells on the right hand side. I also found the r/h Piston gudgeon pin tight in the small end and a pair of left hand side cam followers that did not want to be removed - they were free moving lower down but very very tight at the top edge and had to be prised out.
I have just replaced the big end shells on the one side including new con rod bolts. The Small End was only tight for a few millimeters at one edge so that was dressed and similarly the cam follower tunnels.
The noise has gone and the engine once again sounds very sweet !
|The beauty of a Guzzi engine and all this can be done while still in the frame|
|Spruced up a large part of the engine casing's and decided to have a change -after 8 years-|
and leave the barrels silver